//
//  XMFirstVC.h
//  TestView
//
//  Created by lk@wxm on 2024/12/4.
//

#import <UIKit/UIKit.h>
typedef void (^MyBlock)(NSString * _Nullable str);  // 定义 block 类型别名

NS_ASSUME_NONNULL_BEGIN

@interface XMFirstVC : UIViewController
@property (nonatomic,strong)MyBlock block;
@end

NS_ASSUME_NONNULL_END
